... b]It only supports bitcoin as its primary payment ...

... Ebay is great for that and I still use it, but their fees are fucking outrageous. I'm sure all of you know that, plus the whole PayPal thing.
I would like to check out OB if/when I get a new desktop computer.
Think of the money you save by not needing a new desktop computer tho

P.S. You don't have to use PP on eBay you know.
http://www.dummies.com/how-to/content/choosing-a-payment-method-on-ebay.html